Update README.md

README.md

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-BuildingWorld: A Structured 3D Building Dataset for Urban Foundation Models
+# BuildingWorld: A Structured 3D Building Dataset for Urban Foundation Models
+
+<div style="display: flex; justify-content: space-between;">
+    <div style="flex: 1; margin-right: 10px; border: 1px solid #ccc; border-radius: 5px; padding: 20px; background-color: #f9f9f9; box-shadow: 0 2px 4px rgba(0,0,0,0.1);">
+        <img src="https://huggingface.co/spaces/BuildingWorld/BuildingWorldChallenge/resolve/main/BuildingWorld/building3.png" alt="Image 1">
+        <h2 style="text-align: center;">Simulated Building PC</h2>
+        <p style="text-align: justify;">The simulated point clouds are generated to approximate real-world airborne LiDAR acquisition, explicitly modeling occlusion effects, visibility constraints, and other scanning-related phenomena to enhance realism.</p>
+    </div>
+    <div style="flex: 1;margin-right: 10px; border: 1px solid #ccc; border-radius: 5px; padding: 20px; background-color: #f9f9f9; box-shadow: 0 2px 4px rgba(0,0,0,0.1);">
+        <img src="https://huggingface.co/spaces/BuildingWorld/BuildingWorldChallenge/resolve/main/BuildingWorld/m3.png" alt="Image 2">
+        <h2 style="text-align: center;">Mesh</h2>
+        <p style="text-align: justify;">The mesh is represented as a simplified triangular surface mesh, where the geometry is approximated using a set of connected triangular facets. This representation reduces geometric complexity while preserving the overall structural shape of the building.</p>
+    </div>
+    <div style="flex: 1;margin-right: 10px; border: 1px solid #ccc; border-radius: 5px; padding: 20px; background-color: #f9f9f9; box-shadow: 0 2px 4px rgba(0,0,0,0.1);">
+        <img src="https://huggingface.co/spaces/BuildingWorld/BuildingWorldChallenge/resolve/main/BuildingWorld/w3.png" alt="Image 3">
+        <h2 style="text-align: center;">Wireframe</h2>
+        <p style="text-align: justify;">The wireframe representation models the building geometry using vertices and edges, capturing the structural layout and topological relationships of the architectural components.</p>
+    </div>
+</div>